A cutting apparatus includes a blade changing apparatus. The blade changing apparatus includes a blade mounting and removal portion, which in turn includes: a holding portion that removably holds a circular base of a cutting blade; a moving support portion that supports the holding portion and moves the holding portion to a removal and mounting position at which an insertion hole in the blade faces a boss of a blade mount; and a coupling mechanism that couples the holding portion with the moving support portion such that the holding portion is freely tiltable with respect to the moving support portion. The coupling mechanism includes a plurality of elastic member pairs, each pair, while tensioning the holding portion in opposite directions, fixing the holding portion to the moving support portion. Forces acting from the elastic member pairs balance each other to thereby support the holding portion tiltably and aerially.

An electrospindle includes a motor for moving a tool and a motor shaft for transmitting motion from the motor to the tool. The electrospindle has a gripping head of the tool and a coupling of the tool to the motor shaft, and the gripping head includes two flanges, between which a portion of the tool and at least one thrust nut of a first flange can be interposed toward a counterflange, so as to hold the tool in position. The electrospindle further includes an insert coupled by screwing to the free end of the motor shaft, the thrust nut being coupled on an end portion of the insert.

A cutting apparatus includes a mount flange having a mount land that has a surface for holding a cutting blade as a consumable part, a changing apparatus for changing cutting blades, and a moving unit for moving the changing apparatus between a changing position for changing cutting blades and a retracted position. The changing apparatus includes a rotational shaft, a first holder for holding a used cutting blade, the first holder having a first holding surface facing in an outward direction from the rotational shaft perpendicularly to the rotational shaft, and a second holder for holding a replacement cutting blade, the second holder being disposed in a position angularly spaced a predetermined angle from the first holder around the rotational shaft, the second holder having a second holding surface facing in an outward direction from the rotational shaft perpendicularly to the rotational shaft.

A cutting machine head and a cutting machine are provided in the present invention. The cutting machine head includes a fixing plate, a cutter holder, a cutting component, a machine head lifting mechanism and a machine head rotating mechanism. The cutter holder is mounted on the fixing plate. The machine head lifting mechanism is connected to the cutter holder, and is used to drive the cutter holder to move up and down on the fixing plate. The cutting component includes at least two cutter head assemblies mounted on the cutter holder. The machine head rotating mechanism is connected to the cutter head assemblies for driving the cutter head assemblies to rotate. The rotating angle of each cutter head assembly of the cutting machine head can be controlled. The machine head rotating mechanism controls the cutter head assembly to rotate when the machine head is cutting, and the resulting cutting line has no flaws, which can ensure the integrity of the cutting pattern.

The cutting machine for cutting logs of web material, includes a cutting head arranged along the feeding path of the logs. The cutting head includes a coupling for a disc-shaped cutting blade and is designed to impart the disc-shaped cutting blade a rotary motion around the axis thereof and a cyclic movement to cut the logs into single rolls, and to allow the logs to move forward along the feeding path. The machine also includes a store unit for disc-shaped cutting blades associated with the cutting head. A handling member is provided to remove a worn disc-shaped cutting blade from the cutting head and replace the worn disc-shaped cutting blade with a new disc-shaped cutting blade taken from the store unit.

A cutting system includes an articulated robot and a cutting device, and the cutting device includes a body and a cutter unit. The body includes a motor that rotates a rotary blade. The cutter unit includes a case housing a part of the rotary blade and a guiding part linked to the case and housing another part of the rotary blade, and has, between the case and the guiding part, a space for cutting into which an object to be cut (a film) is introduced. The articulated robot moves the cutting device and the object to be cut relative to each other. A part of the rotary blade is exposed in the space for cutting, and the cutter unit of the cutting device is attachable to and detachable from the body.

The present invention relates to a knife holder for cutting machines, with a cutter head (1) for holding a knife (2) and a positioning device (3), wherein the positioning device (3) can be driven in a drive direction (4) between a standby position and a cutting position, and comprises a spring (5), with which the positioning device (3) is applied against the drive direction (4), wherein the spring (5) generates a negative force characteristic curve in the drive direction (4).

A tissue log cutting saw has an arm movable orbitally within an interior of saw house. A spindle and housing is mounted to the arm. A tool holder with a blade is arrangeable at a first end of the spindle, and an opposite second end rotationally drives the spindle while providing access to an operator of a clamp in the spindle. The clamp is moveable between a hold position in which the clamp engages the tool holder at the first end, and a release position in which the clamp disengages from the tool holder and allows the tool holder to be removed from the first end. An actuator mounted to a structure separate from the arm has an end effector that cooperates with the operator of the clamp to enable the tool holder to be released from the clamp to facilitate automatic changing of a blade of the saw.

A trimming apparatus includes a trimmer head assembly and trimmer head frame portion. The trimmer head assembly including a first wheel, a second wheel, a drive motor coupled to the first wheel, the trimmer head assembly first and second wheels in frictional contact with each other and their rotation axis defining a non-zero camber angle, A trimming apparatus may include a plurality of trimmer head assemblies arranged in a grid, and include movable grid flap assemblies. A trimming apparatus may include a plurality of trimmer head assemblies formed and distributed as a drum module, or a plurality of drum modules. A trimming apparatus may include a single trimmer head assembly with a handle for manual operation.

A machine for transversely cutting logs of paper material including a cutting station in which is arranged a cutting unit including an arm rotating about a horizontal axis and on which it can mounted a blade adapted to perform the transverse cutting of one or more logs of paper material introduced in the machine and placed in the cutting station, where is arranged a loading station in which a support is provided for supporting a further blade intended to replace the blade mounted on said arm, and in which said support is connected to a mobile unit allowing it to be moved between said stations. The support is always provided with a blade-holder hub with a respective pin. The blade-holder hub is removably connected to the support.